Two-Rock CLASSIC REVERB SIGNATURE, Owner'S Manual, Page: 3 / 10

Input Jack - High impedance input to the amplifier. Plug in your instrument here.
FET Switch - Enables or defeats the FET circuit. (“ON” is “up” position)
To enable footswitch control of this function, the switch must be in the down position.
When the FET circuit is switched on, the FET GAIN determines the level of boost or cut in the
signal fed to the following stage of the amplifier.
FET GAIN - The FET (Field Effect Transistor) circuit consists of a single stage high impedance
preamp/buffer. This is a very dynamic clean boost that when turned up past the 12 o’clock position
can be used to boost the signal for increased gain, touch sensitivity, sustain and overdrive. This
circuit can also be used to buffer the input from high output pickups. When set below the 12
o’clock position it will actually reduce the level of gain and bass, and essentially “clean up” the
signal before it passes to the next stage of the amplifier.
BRIGHT Switch - Boosts the high frequency response. This is most effective when the
Gain control is set at 12 o’clock or lower. This is great for adding sparkle to clean tones. The effect
is less dramatic as the Gain control is adjusted past the 12 o’clock position.
TREBLE - Adjusts the high frequency response. At lower settings of this control the tone will be
warmer and smoother. As you turn this control up the highs become more prominent and
aggressive adding gain to the signal as well. This control is very interactive with the Bright switch,
Middle control, and Deep switch. In the full counter-clockwise position, high frequencies are
bypassed to ground. In the full clockwise position, high frequencies are allowed to pass to the next
gain stage.
MID Switch - Boosts the midrange frequency response.
MIDDLE - Adjusts the midrange response. At low settings of this control the tone will be “scooped”
of midrange response, emphasizing the highs and lows. As this control is turned up, the midrange
frequencies are increased. This creates the “body” of your guitar’s tone and is very critical to both
the tonality, feel and overall response of the amplifier. Higher settings of this control also help your
tone to cut through the mix in both a live band situation as well as when playing the amp outdoors.
In the full clockwise position, mid-range frequencies are allowed to pass to the next gain stage.
DEEP Switch
- Boosts the lower bass frequencies. This low frequency contour switch also shifts
the emphasis from the upper bass frequencies to the lower bass frequencies which helps smooth
out and clarify the midrange response.